Key takeaway
Key takeaways
- Audience size and venue shape move the number more than anything else
- Hall Coverage Design: Convention halls, ballrooms and indoor gatherings up to 3,000 guests
- Open Ground Array: Outdoor grounds and large weddings, 5,000 – 20,000 guests
- Arena & Mass Gathering: Arenas, stadiums, political and spiritual gatherings, 25,000 – 50,000+
- Insist on an itemised quote naming exact models and every crew role
What drives the price of line array systems
A line array is a coverage engineering exercise, not a stack of boxes. We model the room or the ground in prediction software — Soundvision for L-Acoustics, ArrayCalc for d&b — using the actual seating geometry, trim height and surface materials. The output is a splay-angle schedule for each box in the hang, a rigging plot with point loads, and an SPL map that shows what the last row receives against the front row. The design target for speech-heavy and large-crowd work is coverage within about ±3 dB across the audience, with energy deliberately kept off ceilings, rear walls and any surface that returns a late reflection.
Scope tiers
Hall Coverage Design
Convention halls, ballrooms and indoor gatherings up to 3,000 guests
- Soundvision or ArrayCalc model of the actual room geometry
- Twelve-box compact array per side with four to six subs
- Front fill line for the first four rows
- On-site Smaart alignment with measured traces handed over
- System engineer and two technicians for the build
Open Ground Array
Outdoor grounds and large weddings, 5,000 – 20,000 guests
- Main hangs plus outfills with cardioid or end-fire sub array
- One to two delay positions with towers, ballast and power
- Rigging plot with point loads and certified rigging crew
- Boundary SPL measurement against the site noise condition
- Redundant amplification and dual supply distribution
Arena & Mass Gathering
Arenas, stadiums, political and spiritual gatherings, 25,000 – 50,000+
- Multi-hang design with 270° or 360° coverage and delay rings
- Three to six delay positions, each individually timed and aligned
- Full SPL prediction map and intelligibility modelling for speech
- Distributed amplification with generator-side power coordination
- Crew chief, two system engineers and a rigging team
What your event size actually needs
| Scale | Guests | Recommended setup |
|---|---|---|
| Ballroom | 300 – 800 | Twelve-box compact line array per side, four subs, no delays, two front fills |
| Convention hall | 1,000 – 3,000 | Twelve to sixteen boxes per side, six to eight subs, front fill line, one under-balcony fill |
| Open ground | 5,000 – 10,000 | Sixteen-box hangs per side with outfills, twelve cardioid subs, one delay position |
| Arena | 12,000 – 25,000 | Main and side hangs, flown sub hangs, two to three delay positions with towers |
| Stadium or maidan | 30,000 – 50,000+ | Four to six hangs, distributed delay rings every 60 m, 500 kW+ of amplification |
What a real quote specifies
| Specification | Detail |
|---|---|
| Prediction software | L-Acoustics Soundvision, d&b ArrayCalc, Meyer MAPP |
| Coverage tolerance target | ±3 dB across the defined audience area |
| Array sizes | 6 – 24 boxes per hang, single or double hangs plus outfills |
| Delay timing constant | ≈2.9 ms per metre, temperature-corrected on the day |
| Delay position spacing | Every 50 – 70 m of audience depth beyond the main hang |
| Sub configurations | Cardioid blocks, end-fire lines, flown sub hangs, ground-stacked arcs |
| Rigging | Certified motors with load cells, point loads documented per hang |
| Amplification redundancy | N+1 at rack level with dual feeds and ring-topology audio network |
| Verification | Smaart transfer-function measurement at a minimum of six audience positions |
| Practical crowd range | 1,000 – 50,000 guests depending on hang count and delay rings |
Where scope quietly expands
What can go wrong
How we prevent it
- What can go wrong
The venue's published rigging capacity turns out to be theoretical and will not take the hang.
How we prevent itWe require a point-load sign-off from the venue or a structural engineer at T-2 weeks, and keep a ground-support tower design as the fallback.
- What can go wrong
Delay towers are timed at noon and sound wrong at 9 pm as the air cools and the speed of sound drops.
How we prevent itDelays are computed with the forecast show-time temperature and re-measured just before doors, which typically moves each tower a fraction of a millisecond.
- What can go wrong
Low frequency from ground-stacked subs rolls straight into the nearest housing and triggers a complaint.
How we prevent itA cardioid or end-fire sub array cuts rearward output by 15 dB or more in the problem direction, measured at the boundary before the show.
- What can go wrong
Coverage is modelled for the drawn seating plan, then the client adds 1,500 chairs on the flanks the day before.
How we prevent itWe design the hang with outfill capacity in reserve and keep the splay schedule adjustable, so flank coverage is a change of angle rather than a change of system.
How to get more value
Lock dates early in the October–March peak, combine services with one vendor so crew and transport are not duplicated, and schedule a single technical rehearsal rather than paying for idle build days. Get an itemised quote from Prime AV Solutions within 24 hours — call +91 93093 80958 or WhatsApp our producers.
Published 23 August 2026 by the Prime AV Solutions production team.